quoteA damaru (Skt.damaru; Devanagari: डमरु) or damruis a small two-headed drum, used in Hinduism and Tibetan Buddhism.

In HinduismThe damaru is very common throughout the Indian subcontinent. The damaru is known as a power drum, and when played, it is believed to generate spiritual energy. It is associated with the Hindu deity Shiva. It is believed that Sanskrit language was recognized by the drumbeats of the damaru (see Shiva Sutra for the sounds), and His performance of the cosmic dance of tandava. The damaru is used by itinerant musicians of all stripes, due to its small portable size.

In the shield shape of some damarus, the triangular upward representation also symbolizes male procreativity (the Lingam), and the downward round representation symbolizes the female procreativity (the Yoni). Symbolically, the creation of the world begins when the lingam and yoni meet at the midpoint of the damaru, and the destruction takes place when they separate from each other.

Damru is one of the attributes of several deities and gods (of Hindus), particularly of Shiva. Damru is a small hourglass shaped drum, and is particularly associated with Shiva in his aspect as the Nataraja, performing the cosmic dance of tandava. The sound of damru represents the primeval sound and the rhythm from which, according to cosmology, the universe emerges and in which it dissolves into, before re-emerging again.

Indian Musical Instrument Damaru is the most common hour-glass drum in India. There are two drumheads on each side of the resonator which are laced together with cord. Near the centre of the lacing are two loose knoted cords. The knots on each end strike both heads to produce a rattling sound. This is affected by rotating the drum rapidly in alternating directions. The pitch is bent by squeezing the lacing.The damaru has very strong cultural associations. It is strongly associated with the God Shiva and sadhus ( Hindu religious men).

The Resonator is Made of brass and the height of Damru is around 6"The weight of damru varies from 250-330 gms.source : www.devshoppe.com